Interstellar Flight: Perspectives and Patience

The comment by Benjamin Stockton on the article page is spot-on:

>I just wonder if humanity’s adventurous nature is leading us away from a proper focus on the sustainability of our civilization, our specie, and our fragile planetary environment?

But we still need spaceflight at least for planetary defense against asteroids, mining asteroids(so we don't have to mine Earth), etc.

Our civilization has been driven by expansion. Without it we'd probably collapse into a neurally-connected well-organized ant colony without need for further technological/social/economic progress (which would naturally select/cull out corresponding features in our brain). And, i'd guess that is possible one of the forms of the Great Filter stopping many civilizations.

At 53 and good health, i'm contemplating that my end in 30-40 years would be me buying a one way to Mars and just exiting the habitat out without suit after enjoying a dinner with a Martian sunset view, breaking, even in such a small way, the chains of "We come from the earth, we return to the earth" :)

Why would we not chase technological progress without increasing our proverbial footprint? We're not starting to inhabit new bodies of land for a long time now. We're slowing down our footprint growth among those in the most developed places but chasing new technologies hasn't slowed down accordingly.